JP2004247824A - Radio base station system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio base station system capable of continuing a service for an operating system even on the occurrence of a fault in any of radio transmission/reception sections in a configuration wherein a base station apparatus and a plurality of the radio transmission/reception sections are connected in cascade with an optical fiber. <P>SOLUTION: Each of the radio transmission/reception sections 102, 103 connected to the base station apparatus 101 in cascade with the optical fiber includes a bus select section 26 for bypassing a received multiplex signal outputted from the other radio transmission/reception section connected at least to a post-stage as an uplink signal. For example, when a fault takes place in the radio transmission/reception section 102, the radio transmission/reception section 102 allows the bus select section 26 to bypass the received multiplex signal of the radio transmission/reception section 103 connected to the post-stage without any modification and outputs the signal to the base station apparatus 101. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a radio base station system used for a mobile communication system, and more particularly to a radio base station system in which a base station apparatus and a plurality of radio transmission / reception units are cascade-connected (cascaded) with optical fibers.
[0002]
[Prior art]
Conventionally, in a radio base station system used for a mobile communication system, when a radio transmitting / receiving section is separated from a base station apparatus and is located at a position distant from the base station apparatus, a coaxial cable is used between the base station apparatus and the radio transmitting / receiving section. I was connected.
[0003]
However, in the case of a system in which the base station apparatus and the wireless transmitting / receiving section are connected by a coaxial cable, when performing long-distance transmission between the base station apparatus and the wireless transmitting / receiving section, transmission loss is large. It is necessary to provide a large power amplifying unit in each device, and there is a drawback that the cost and power consumption are high.
[0004]
For this reason, recently, a method has been used in which a base station apparatus and a wireless transmission / reception unit are connected by an optical fiber suitable for long-distance transmission. As a method of connecting an optical fiber between the base station apparatus and the wireless transmitting / receiving section, for example, a method of converting an analog wireless signal into an optical signal via the optical fiber between the base station apparatus and the wireless transmitting / receiving section and transmitting the signal. is there. In addition, there is a method in which a base station apparatus and a plurality of wireless transmission / reception units are cascaded by an optical fiber (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-08-0111719
[0006]
[Problems to be solved by the invention]
However, the above-described conventional techniques have the following problems.
[0007]
In a system in which an analog wireless signal is converted to an optical signal via an optical fiber and transmitted between the base station apparatus and the wireless transmitting / receiving unit, the NF deteriorates during long-distance transmission because the analog wireless signal is used. It is difficult to secure a high dynamic range because of a defect and a restriction on the dynamic range of the optical signal.
[0008]
In a system in which a base station apparatus and a plurality of wireless transmitting / receiving sections are cascaded, when a failure occurs in any wireless transmitting / receiving section, the operation of a wireless transmitting / receiving section connected downstream of the failed wireless transmitting / receiving section is stopped. As a result, the service of the operation system had to be stopped.
[0009]
An object of the present invention is to provide a configuration in which a base station apparatus and a plurality of wireless transmission / reception units are cascaded by an optical fiber, so that the service of the operation system can be continued even when one of the wireless transmission / reception units fails. Another object of the present invention is to provide a wireless base station system that can operate the system at low cost without being restricted by NF (noise figure) or dynamic range.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a radio base station system of the present invention comprises:
In a wireless base station system having a base station apparatus and a plurality of wireless transmitting / receiving means cascaded to the base station apparatus by two or one optical fiber, the wireless transmitting / receiving means is connected at least in a subsequent stage. And a bypass unit for bypassing the received multiplexed signal output as an uplink signal from another wireless transmission / reception unit.
[0011]
In this case, the wireless transmitting / receiving means combines a reception multiplexed signal output from another wireless transmission / reception means connected at a subsequent stage with a reception multiplexed signal of its own wireless transmission / reception means and outputs the combined signal to the bypass means. A synthesizing unit, wherein the bypass unit cuts off the reception multiplexed signal output from the first synthesizing unit when a failure occurs in its own wireless transmitting and receiving unit, and the other wireless transmitting and receiving unit connected to a subsequent stage May be bypassed as it is and output to the base station apparatus or another wireless transmission / reception means connected to the preceding stage.
[0012]
Further, when the wireless transmitting / receiving means is operating normally, the bypass means transmits the received multiplexed signal output from the first combining means to the base station apparatus or another wireless transmitting / receiving means connected to the preceding stage. It may be output.
[0013]
Further, the radio transmitting / receiving means distributes a transmission multiplex signal output as a downlink signal from the base station apparatus or another radio transmission / reception means connected to a preceding stage, and transmits one transmission multiplex signal as it is connected to a subsequent stage. And a first separating unit for outputting to the wireless transmitting / receiving unit.
[0014]
Further, the base station apparatus multiplexes a transmission baseband signal and a transmission control signal for performing setting or status monitoring of each of the plurality of radio transmission / reception means, and generates a transmission multiplexed signal for the plurality of radio transmission / reception means. , And multiplexes the reception multiplexed signals for the plurality of radio transmission / reception means output from the radio transmission / reception means connected to the subsequent stage into reception baseband signals and reception control signals. It is good.
[0015]
The wireless transmission / reception means receives the other transmission multiplexed signal distributed by the first demultiplexing means as input, and extracts only the transmission multiplexed signal addressed to its own wireless transmission / reception means from the other input transmission multiplexed signal. A second separating unit that separates the extracted transmission multiplexed signal into a transmission baseband signal and a transmission control signal and outputs the transmission baseband signal and the transmission baseband signal output from the second separation unit; A transmission radio processing means for converting the transmitted transmission baseband signal into a transmission radio signal for external radio transmission, and a transmission control signal output from the second separation means, and Control means for generating and outputting a reception control signal for performing a setting response or a status monitoring response to the base station apparatus based on a transmission control signal; and a reception radio signal received wirelessly from the outside as an input. Receiving radio processing means for converting an input received radio signal into a reception baseband signal and outputting the received radio signal; and a reception control signal output from the control means and a reception baseband signal output from the reception radio processing means as inputs. And a second combining unit that multiplexes the input reception control signal and the received baseband signal to generate and output a reception multiplexed signal of its own wireless transmission / reception unit.
[0016]
The wireless transmission / reception unit receives a reception multiplexed signal output from another wireless transmission / reception unit connected at a subsequent stage, converts the received reception multiplexed signal from an optical signal to an electric signal, and outputs the converted signal. An optical-to-electrical conversion unit, and a receiving multiplexed signal output from the first optical-to-electrical conversion unit, and the input multiplexed signal is converted from serial data to parallel data and output to the bypass unit. 1 deserializer means, first serializer means which receives a received multiplexed signal output from the bypass means, converts the received received multiplexed signal from parallel data to serial data, and outputs the converted data. Receiving the multiplexed signal output from the means, converting the received multiplexed signal from an electric signal to an optical signal, and connecting the base station connected to the preceding stage First electrical / optical conversion means for outputting to a wireless communication device or another wireless transmission / reception device, wherein the bypass device has another wireless transmission / reception device connected to a subsequent stage when a failure occurs in its own wireless transmission / reception device. It may be a bus selecting means for bypassing the received multiplexed signal output from the means from the first deserializer means to the first serializer means. In this case, the wireless transmission / reception unit receives the transmission multiplex signal output from the base station apparatus or another wireless transmission / reception unit connected to the preceding stage as an input, and converts the input transmission multiplex signal from an optical signal to an electric signal. A second optical-to-electrical converting means for receiving and outputting, and a transmission multiplexed signal output from the second optical-to-electrical converting means as input, converting the input transmission multiplexed signal from serial data to parallel data, A second deserializer for outputting to the first separator, and one of the transmission multiplex signals distributed by the first separator are input, and the input transmission multiplex is converted from parallel data to serial data. And a transmission multiplexed signal output from the second serializer, and converts the input transmission multiplexed signal from an electrical signal to an optical signal. Conversion, and it may have a second electrical / optical conversion means for outputting to other wireless transceiver means connected to the subsequent stage.
[0017]
The wireless transmission / reception means receives a reception multiplexed signal output from another wireless transmission / reception means connected at a subsequent stage as an input, converts the input reception multiplexed signal from an optical signal to an electric signal, and outputs the converted signal to the bypass means. A first optical-to-electrical converting means, and a received multiplexed signal output from the bypass means, and the input received multiplexed signal is converted from an electric signal to an optical signal. Alternatively, a first electric / optical conversion means for outputting to another wireless transmission / reception means and a reception multiplex signal output from the first combination means are input, and the input reception multiplex signal is converted from parallel data to serial data. First serializer means for outputting the received multiplexed signal output from the bypass means to the bypass multiplexing means; First deserializer means for converting the data into parallel data and outputting the parallel data to the first synthesizing means, wherein the bypass means is connected to the other connected to a subsequent stage when its own radio transmitting / receiving means fails. And a switching unit that bypasses the received multiplexed signal output from the wireless transmission / reception unit from the first optical / electrical conversion unit to the first electric / optical conversion unit. In this case, the wireless transmission / reception unit receives the transmission multiplex signal output from the base station apparatus or another wireless transmission / reception unit connected to the preceding stage as an input, and converts the input transmission multiplex signal from an optical signal to an electric signal. A second optical / electrical conversion means for outputting to the switching means, and a transmission multiplexed signal output from the switching means, converting the input transmission multiplexed signal from an electric signal to an optical signal, and connecting to a subsequent stage The second electrical / optical conversion means for outputting to the other wireless transmission / reception means and one of the transmission multiplex signals distributed by the first separation means are input, and the input transmission multiplex signal is converted from parallel data. A first serializer that converts the data into serial data and outputs the serial multiplexed signal to the switching unit; a transmission multiplexed signal output from the switching unit; First deserializer means for converting the serial data into parallel data and outputting the converted data to the first separating means, wherein the switching means is connected to a previous stage when its own wireless transmitting / receiving means has failed. The transmission multiplex signal output from the base station apparatus or another wireless transmission / reception unit may be bypassed from the second optical / electrical conversion unit to the second electric / optical conversion unit.
[0018]
(Action)
In the present invention configured as described above, the radio transmission / reception unit is provided with the bypass unit that bypasses the reception multiplexed signal output from at least the other radio transmission / reception unit connected at the subsequent stage, so that a failure occurs. In this case, it is possible to directly bypass-output to the base station apparatus or another wireless transmitting / receiving means connected to the preceding stage without destroying the reception multiplexed signal of the other wireless transmitting / receiving means connected to the succeeding stage.
[0019]
Thus, even if a failure occurs in any of the wireless transmission / reception units, it becomes possible to continue the service of the operation system without stopping the operation of all the wireless transmission / reception units connected in the subsequent stage.
[0020]
Further, the wireless transmitting / receiving means is provided with first separating means for distributing a transmission multiplexed signal of the base station apparatus or another wireless transmitting / receiving means connected to the preceding stage and outputting the multiplexed signal as it is to another wireless transmitting / receiving means connected to the succeeding stage. Thus, when any one of the wireless transmission / reception means fails, the transmission multiplexed signal of the base station apparatus or the other wireless transmission / reception means connected to the preceding stage is not destroyed and the other wireless transmission / reception means connected to the subsequent stage is not destroyed. It is possible to directly output the distribution to the means.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a base station device is a W-CDMA base station device used in a mobile communication system, and a plurality of wireless transmission / reception units cascaded (cascaded) to the base station device. The description will be made assuming that it is far away. Further, the base station apparatus and the wireless transmission / reception unit and between the wireless transmission / reception units are connected by an optical fiber suitable for long-distance transmission, and this optical fiber performs serial transmission at a transmission rate of 600 Mbps to 1.25 Gbps. It will be described as an example. In addition, a description will be given assuming that two-core bidirectional communication is performed between the base station apparatus and a plurality of wireless transmission / reception units via two (one input / output) optical fibers. By using an optical / electrical conversion unit or an electric / optical conversion unit having a multiplexing function, it is possible to perform single-core bidirectional communication via one optical fiber (one input / output).
[0022]
(1st Embodiment)
FIG. 1 is an overall block diagram of a wireless base station system according to an embodiment of the present invention.
[0023]
Referring to FIG. 1, a wireless base station system according to an embodiment of the present invention includes a base station apparatus 101 and wireless transmitting / receiving sections 102 and 103 cascaded to the base station apparatus 101 by two optical fibers 104. are doing.
[0024]
FIG. 2 is a detailed block diagram of the base station device 101.
[0025]
Referring to FIG. 2, the base station apparatus 101 generates and outputs a transmission baseband signal, a transmission baseband signal processing unit 1, generates and outputs a transmission control signal, and receives a reception control signal as an input, A CPU 2 that processes a control signal, a combining unit 3 that receives and combines the transmission baseband signal output from the transmission baseband signal processing unit 1 and the transmission control signal output from the CPU 2, and outputs a transmission multiplexed signal; The transmission multiplexed signal output from the synthesizing unit 3 is input, the parallel data is converted into serial data, and the serializer unit 4 that outputs the data is input. The transmission multiplexed signal output from the serializer unit 4 is input, and the electric signal is converted into an optical signal. An electric / optical conversion unit 5 that converts and outputs the signal to the wireless transmission / reception unit 102 and a reception multiplexed signal output from the wireless transmission / reception unit 102 and converts the optical signal into an electric signal The deserializer unit 7 that receives and outputs the optical / electrical converter 6 and the received multiplexed signal output from the optical / electrical converter 6, converts serial data into parallel data, and outputs the parallel data. A separation unit 8 which receives the output received multiplexed signal, outputs a reception control signal to the CPU 2 and outputs a reception baseband signal, and a reception baseband signal output from the separation unit 8 and A reception baseband signal processing unit 9 for processing a band signal.
[0026]
FIG. 3 is a detailed block diagram of the wireless transmission / reception unit 102. The wireless transmitting / receiving section 103 has the same configuration as the wireless transmitting / receiving section 102.
[0027]
Referring to FIG. 3, radio transmission / reception section 102 receives a transmission multiplexed signal output from base station apparatus 101 as an input, converts an optical signal into an electric signal, and outputs an optical / electrical conversion section 11; The transmission multiplexed signal output from the unit 11 is input, the serial data is converted into parallel data, and the deserializer unit 12 for outputting is output. The transmission multiplexed signal output from the deserializer unit 12 is input and separated into two. And a serializer 14 for converting parallel data into serial data and outputting the serial multiplexed signal, and a transmission multiplexed signal output from the serializer 14. The electrical / optical conversion unit 15 that converts an electric signal into an optical signal and outputs the converted signal to the wireless transmission / reception unit 103 and the other transmission multiplex output from the separation unit 13 Signal, and a separation unit 16 that outputs a transmission control signal and a transmission baseband signal; and a transmission control signal that is output from the separation unit 16 as an input, processes the control signal, and generates a reception control signal; A CPU 17 for outputting, a transmission baseband signal output from the separation unit 16 as an input, a transmission radio processing unit 18 for generating a transmission radio signal, and a transmission radio signal output from the transmission radio processing unit 18 as an input. A duplexer unit 19, an antenna unit 20 that receives a transmission radio signal output from the duplexer unit 19, outputs the radio signal to the outside, and receives and outputs a reception radio signal output from the outside, A reception radio processing unit 21 that receives the output reception radio signal as an input and outputs a reception baseband signal, and a reception base that is output from the reception radio processing unit 21 And a reception control signal output from the CPU 17, and multiplexes and outputs a reception multiplexed signal. A reception multiplexed signal output from the radio transmission / reception unit 103 is input, and an optical signal is converted into an electric signal. And a deserializer 25, which receives the multiplexed signal output from the optical / electrical converter 24, converts serial data into parallel data, and outputs the parallel data. When the wireless transmission / reception unit 102 is normal, it transmits the received multiplexed signal to the combining unit 23 and outputs the combined received multiplexed signal output from the combining unit 23 to the serializer unit 27. A bus selection unit 26 for outputting to the combining unit 23 and blocking the received multiplexed signal output from the combining unit 23; A combining unit 23 that combines the reception multiplexed signal output from the connection unit 26 and the reception multiplexed signal output from the combining unit 22 and outputs the combined signal to the bus selection unit 26, and parallel data of the reception multiplexed signal output from the bus selection unit 26. Is converted to serial data, and a serializer unit 27 that outputs the serial data, and an electric / optical converter 28 that receives the multiplexed signal output from the serializer unit 27, converts an electric signal to an optical signal, and outputs the optical signal to the base station apparatus 101. And
[0028]
FIG. 4 is a block diagram showing details of the bus selection unit 26 in the wireless transmission / reception unit 102. FIG. 5 is a block diagram showing details of the synthesizing unit 23 in the wireless transmitting / receiving unit 102. Although the bus select unit 26 and the synthesizing unit 23 generally process 8-bit or 16-bit parallel data, a configuration for processing 4-bit parallel data will be described here for simplicity.
[0029]
Referring to FIG. 4, an ALM signal indicating whether or not a failure (hereinafter, referred to as ALM) has occurred in its own wireless transmission / reception unit 102 is input to one end of the bus selection unit 26, and the other end of the bus selection unit 26 is transmitted from the deserializer unit 25 to the other end. AND circuits 201a to 201d to which the output 4-bit parallel data is input, a NOT circuit (hereinafter, NOT) 202 to which the above-mentioned ALM signal is input, and a synthesizing unit 23 at one end. Logic in which the output 4-bit parallel data is input, the outputs of the NOTs 202 are input to the other ends of the ANDs 203a to 203d, the outputs of the ANDs 203a to 203d are input to the other end, and the outputs of the ANDs 201a to 201d are input to the other end. It has sum circuits (hereinafter referred to as OR) 204a to 204d. Note that the ALM refers to a state in which various failures have occurred in the wireless transmission / reception unit 102 due to, for example, the stoppage of the operation of the CPU 17 in the wireless transmission / reception unit 102, and a detailed description thereof will be given later.
[0030]
Referring to FIG. 5, combining section 23 includes a receiving buffer 301 for storing 4-bit parallel data output from bus selecting section 26, a transmission buffer 302 for storing 4-bit parallel data output from combining section 22, and a receiving buffer. And a combining buffer 303 for combining and storing the 4-bit parallel data stored in the transmission buffer 302 and the transmission buffer 302, respectively.
[0031]
Hereinafter, an example of the operation of the wireless base station system according to the first embodiment of the present invention configured as described above will be described.
[0032]
First, the flow of a downlink signal (transmission signal) transmitted to an external terminal device (not shown) will be described with reference to FIGS.
[0033]
Referring to FIG. 2, in base station apparatus 101, transmission baseband signals for two carriers generated by transmission baseband signal processing section 1 are output to combining section 3. On the other hand, in the CPU 2, a transmission control signal for performing various settings and status monitoring of the wireless transmission / reception units 102 and 103 is generated and output to the synthesis unit 3.
[0034]
Next, in the synthesizing unit 3, the transmission baseband signals for two carriers output from the transmission baseband signal processing unit 1 and the transmission control signal output from the CPU 2 are multiplexed. In the multiplexing process, as shown in FIG. 6, first, a synchronization signal is added to the beginning of a frame. The synchronization signal is used to detect each carrier of the transmission baseband signal and the data position of the transmission control signal. Further, a transmission control signal is added at a time subsequent to the synchronization signal. Since the transmission baseband signal is amplitude data, continuous transmission is necessary, and the transmission control signal generally has a smaller data amount than the transmission baseband signal. In addition, transmission baseband signals of carrier 1, carrier 2, carrier 3, and carrier 4 are added at the next time after the transmission control signal. In this example, the transmission baseband signals of carrier 3 and carrier 4 are empty. In optical fiber transmission, 8 / 10-bit conversion processing is usually performed by 8B / 10B encoding / decoding, and a 10-bit signal is transmitted serially.
[0035]
The transmission multiplex signal subjected to the multiplexing processing in the combining unit 3 is input to the serializer unit 4 and converted into serial data. The transmission multiplex signal converted to serial data by the serializer unit 4 is input to the electric / optical conversion unit 5 and converted from an electric signal to an optical signal. The transmission multiplex signal converted into an optical signal by the electric / optical conversion unit 5 is output to the wireless transmission / reception unit 102 via the optical fiber 104.
[0036]
Referring to FIG. 3, in radio transmitting / receiving section 102, a transmission multiplex signal output from base station apparatus 101 is input to optical / electrical conversion section 11, and is converted from an optical signal to an electric signal. The transmission multiplex signal converted into an electric signal by the optical / electrical converter 11 is input to the deserializer 12 and converted into parallel data. Since the deserializer 12 can normally extract the CLK synchronized with the serial data on the transmission side, the base station apparatus 101 and the wireless transmission / reception unit 102 perform frequency synchronization by using this CLK as the reference CLK of the wireless transmission / reception unit 102. Can be taken.
[0037]
Next, the transmission multiplex signal converted into parallel data by the deserializer unit 12 is input to the separation unit 13. In the demultiplexer 13, the transmission multiplexed signal output from the deserializer 12 is distributed and output to both the serializer 14 and the demultiplexer 16. In this way, by causing the demultiplexing unit 13 to output the same transmission multiplexed signal to both the serializer unit 14 and the demultiplexing unit 16, the subsequent wireless transmission and reception unit 103 can extract the same transmission multiple signal as the wireless transmission and reception unit 102. deep.
[0038]
One of the transmission multiplexed signals output from the demultiplexer 13 is input to the serializer 14 and converted into serial data. The transmission multiplex signal converted to serial data by the serializer 14 is input to the electrical / optical converter 15 and is converted from an electrical signal to an optical signal. The transmission multiplex signal converted into an optical signal by the electric / optical conversion unit 15 is output to the wireless transmission / reception unit 103 via the optical fiber 104.
[0039]
On the other hand, the other transmission multiplexed signal output from demultiplexing section 13 is input to demultiplexing section 16. The demultiplexing section 16 extracts only the signal addressed to the radio transmission / reception section 102 from the transmission multiplexed signal output from the demultiplexing section 13, and further demultiplexes the extracted signal into a transmission control signal and a transmission baseband signal. In the extraction process, the positions of the transmission control signal and the transmission baseband signal addressed to the wireless transmission / reception unit 102 are recognized based on the position of the synchronization signal, and each data is extracted. For example, carrier 1 and carrier 2 can be assigned to the radio transmission / reception units 102 and 103, respectively, and in this case, transmission of one carrier at maximum is possible per radio transmission / reception unit. By performing the extraction processing in the separation unit 16 in this way, the CPU 17 can process only the transmission control signal addressed to the wireless transmission / reception unit 102 of the CPU 17 and the components disposed after the transmission wireless processing unit 18 Can process only the transmission baseband signal addressed to its own wireless transceiver 102.
[0040]
Next, the transmission baseband signal input to the transmission wireless processing unit 18 is subjected to digital / analog conversion, frequency conversion, and output to the duplexer unit 19 as a transmission wireless signal. The transmission radio signal input to the duplexer 19 is output to the antenna 20. Note that the transmission radio signal is not leaked to the reception radio processing unit 21 because it has directionality. The transmission wireless signal input to the antenna unit 20 is output to the outside, becomes a radio wave, and is transmitted to the terminal device by spatial propagation.
[0041]
Note that the wireless transmission / reception section 103 performs the same operation as that of the wireless transmission / reception section 102 with the transmission multiplexed signal output from the wireless transmission / reception section 102 as an input.
[0042]
Next, the flow of an uplink signal (received signal) received from an external terminal device (not shown) will be described with reference to FIGS. 2, 3, 4, and 5. FIG.
[0043]
Referring to FIG. 3, in radio transmitting / receiving section 102, a received radio signal transmitted from an external terminal apparatus and spatially propagated is input to antenna section 20, and output from antenna section 20 to duplexer section 19. The reception radio signal input to the duplexer 19 is output to the reception radio processing unit 21. It should be noted that the reception radio signal is not leaked to the transmission radio processing unit 18 because of its directionality. The reception radio signal input to the reception radio processing unit 21 is subjected to frequency conversion, analog / digital conversion, and output to the synthesis unit 22 as a reception baseband signal. On the other hand, the CPU 17 generates a reception control signal for performing various setting responses and status monitoring responses to the base station device 101, and outputs the reception control signal to the combining unit 22.
[0044]
Next, the combining unit 22 multiplexes the reception control signal output from the CPU 17 and the reception baseband signal output from the reception radio processing unit 21. The received multiplexed signal subjected to the multiplexing process in the combining unit 22 is input to the combining unit 23. In the multiplexing process, as in the case of the transmission signal, first, as shown in FIG. 6, a synchronization signal is added to the beginning of the frame. The synchronization signal is used to detect each carrier of the reception baseband signal and the data position of the reception control signal. Further, a reception control signal is added at a time subsequent to the synchronization signal. Since the reception baseband signal is amplitude data, continuous transmission is necessary, and the reception control signal generally has a smaller data amount than the reception baseband signal. Further, at the time following the reception control signal, the reception baseband signals of carrier 1 and carrier 2 are respectively added. In optical fiber transmission, 8 / 10-bit conversion processing is usually performed by 8B / 10B encoding / decoding, and a 10-bit signal is transmitted serially.
[0045]
On the other hand, multiplexing processing similar to the above is performed in the wireless transmission / reception unit 103 in the subsequent stage, and the reception multiplexed signal of the wireless transmission / reception unit 103 is output to the wireless transmission / reception unit 102 via the optical fiber 104. The received multiplex signal output from the wireless transmission / reception unit 103 is input to the optical / electrical conversion unit 24, and is converted from an optical signal to an electric signal. The received multiplex signal converted into an electric signal by the optical / electrical conversion unit 24 is input to the deserializer unit 25 and converted into parallel data. The received multiplex signal converted into parallel data by the deserializer 25 is input to the bus selector 26.
[0046]
Subsequent operations are different depending on whether the wireless transmitting / receiving unit 102 is operating normally, that is, whether there is no occurrence of ALM. The operation and the operation when the wireless transmission / reception unit 102 operates abnormally will be described separately.
[0047]
First, a description will be given of an operation when the wireless transmission / reception unit 102 is operating normally, that is, when no ALM occurs.
[0048]
Referring to FIG. 4, when no ALM occurs in the wireless transmission / reception unit 102, the L level ALM signal is input to the NOT 202 and the bus selection unit 26 in the wireless transmission / reception unit 102 is connected to one end of each of the ANDs 201 a to 201 d. Is also entered. Further, the 4-bit parallel data output from the deserializer unit 25, that is, the multiplexed signal received by the wireless transmission / reception unit 103 at the subsequent stage is input to the other ends of the ANDs 201a to 201d and is also input to the synthesis unit 23. At this time, since the L level is input to one ends of the ANDs 201a to 201d, the outputs of the ANDs 201a to 201d are fixed to the L level and input to one ends of the ORs 204a to 204d.
[0049]
Referring to FIG. 5, in synthesizing section 23 in wireless transmitting / receiving section 102, 4-bit parallel data output from bus selecting section 26, that is, a reception multiplexed signal from wireless transmitting / receiving section 103 in the subsequent stage is stored in reception buffer 301 and synthesized. The 4-bit parallel data output from the unit 22, that is, the reception multiplexed signal of the own wireless transmission / reception unit 102 is stored in the transmission buffer 302. The reception multiplexed signal stored in the reception buffer 301 is designated in the time slot of the carrier 2 in FIG. 6, and the reception multiplexed signal stored in the transmission buffer 302 is designated in the time slot of the carrier 1 in FIG. The data is output to the synthesis buffer 303 in synchronization with the performed timing. The 4-bit parallel data stored in the synthesis buffer 303 is output to the bus selection unit 26.
[0050]
Referring again to FIG. 4, in the bus selecting unit 26 in the wireless transmitting / receiving unit 102, the 4-bit parallel data output from the combining unit 23, that is, the received multiplexed signal combined by the wireless transmitting / receiving units 102 and 103 is output to the AND 203 a to 203 d. Input to one end. To the other ends of the ANDs 203a to 203d, the output of the NOT 202 fixed at the H level when the wireless transmission / reception unit 102 is operating normally is input. Therefore, the 4-bit parallel data output from the synthesis unit 23 operates through the ANDs 203a to 203d and is input to one ends of the ORs 204a to 204d. Since the L level is input to the other ends of the ORs 204a to 204d as described above, the 4-bit parallel data output from the synthesizing unit 23 is directly output from the ORs 204a to 204d and input to the serializer unit 27.
[0051]
Referring to FIG. 3, the received multiplexed signal input to the serializer 27 is converted into serial data and input to the electrical / optical converter 28. The received multiplexed signal input to the electrical / optical converter 28 is converted from an electrical signal to an optical signal and output to the base station device 101 via the optical fiber 104.
[0052]
Referring to FIG. 2, in base station apparatus 101, a reception multiplexed signal output from wireless transmission / reception section 102 is input to optical / electric conversion section 6, and is converted from an optical signal to an electric signal. The received multiplex signal converted into an electric signal by the optical / electrical converter 6 is input to the deserializer 7 and converted into parallel data.
[0053]
The received multiplex signal converted into parallel data by the deserializer unit 7 is output to the separation unit 8. The separation unit 8 separates the reception multiplex signal output from the deserializer unit 7 into a reception control signal and a reception baseband signal, outputs the reception control signal to the CPU 2, and converts the reception baseband signal into the reception baseband signal processing unit 9. Is output to At this time, the positions of the reception control signal and the reception baseband signal are recognized based on the position of the synchronization signal. When recognizing the position of the reception baseband signal, it is possible to determine which carrier the reception baseband signal belongs to by determining the transmission format in advance as shown in FIG. The reception baseband signal processing unit 9 performs error correction decoding, framing, data demodulation, and despreading processing on the reception baseband signal output from the separation unit 8.
[0054]
That is, in the present embodiment, when the radio transmission / reception unit 102 is operating normally, the reception multiplexed signal combined with the radio transmission / reception unit 102 and the radio transmission / reception unit 103 is output to the base station apparatus 101. The device 101 can correctly decode each of them.
[0055]
On the other hand, an operation when the wireless transmitting / receiving unit 102 is operating abnormally, that is, when an ALM is occurring will be described. The state in which the ALM is occurring means that, for example, the operation of the CPU 17 in the wireless transmission / reception unit 102 is stopped, and the reception multiplexed signal of the carrier 1 and the carrier 2 cannot be correctly accommodated in the designated time slot in FIG. This is a state in which the reception control signal cannot be accommodated correctly and the frequency cannot be synchronized with the base station apparatus 101. In this case, since each cannot be correctly decoded by the base station apparatus 101, communication between the base station apparatus 101 and an external terminal apparatus cannot be performed.
[0056]
Referring to FIG. 4, when an ALM is generated in the wireless transmission / reception unit 102, the bus selection unit 26 in the wireless transmission / reception unit 102 inputs an H-level ALM signal to the NOT 202 and outputs one end of the AND 201 a to 201 d. Is also entered. Therefore, the 4-bit parallel data output from the deserializer unit 25, that is, the multiplexed signal received by the wireless transmission / reception unit 102 operates through the ANDs 201a to 201d and is input to one ends of the ORs 204a to 204d. At this time, since the output of the NOT 202 is at the L level, the other ends of the ANDs 203a to 203d are also at the L level, and the outputs of the ANDs 203a to 203d are fixed at the L level. That is, the received multiplexed signal output from the combining unit 23 is cut off by the ANDs 203a to 203d. Therefore, since the other ends of the ORs 204a to 204d are always at the L level, the 4-bit parallel data output from the deserializer 25 operates through the ORs 204a to 204d and is input to the serializer 27.
[0057]
That is, in the present embodiment, when the wireless transmission / reception unit 102 is abnormally operating, the reception multiplexed signal of the own wireless transmission / reception unit 102 is cut off in the bus selection unit 26, and the upstream transmission / reception unit 103 Only the signal (received multiplexed signal) is bypassed as it is and output to base station apparatus 101.
[0058]
Therefore, for example, when a failure occurs in the wireless transmission / reception unit 102 installed at the position closest to the base station apparatus 101, in the related art, even if the subsequent wireless transmission / reception unit 103 is normal, Since the uplink signal (received multiplexed signal) may be destroyed by passing through the wireless transmission / reception unit 102, the operation of all the wireless transmission / reception units downstream of the wireless transmission / reception unit 102 has to be stopped (system shut down).
[0059]
On the other hand, in the present embodiment, since the uplink signal (reception multiplexed signal) of the subsequent wireless transmission / reception section 103 is bypassed to the base station apparatus 101 by the bus selection section 26 of the wireless transmission / reception section 102, When a failure occurs in the transmission / reception unit 102, the radio transmission / reception unit 102 outputs the uplink signal (received multiplexed signal) to the base station apparatus 101 without being destroyed. Therefore, the operation of the wireless transmission / reception unit 103 at the subsequent stage is not stopped, and only the minimum required operation stoppage (only the failed wireless transmission / reception unit 102) can be performed, so that the service of the operation system can be continued.
[0060]
In the present embodiment, since the downlink signal (transmission multiplexed signal) of the base station apparatus 101 is distributed to the downstream wireless transmitting / receiving section 103 by the separating section 13 of the wireless transmitting / receiving section 102, the wireless transmitting / receiving section 102 When a failure occurs, the wireless transmission / reception unit 102 outputs the downstream signal (transmission multiplexed signal) to the subsequent wireless transmission / reception unit 103 without being destroyed.
[0061]
(Second embodiment)
The radio base station system according to the second embodiment of the present invention differs from the above-described first embodiment only in the internal configuration of the radio transmission / reception units 102 and 103, and differs from the first embodiment in the entire radio base station system shown in FIG. The configuration and the internal configuration of base station apparatus 101 shown in FIG. 2 are the same.
[0062]
FIG. 7 is a diagram illustrating details of the wireless transmission / reception unit 102 in the wireless base station system according to the second embodiment of this invention. The wireless transmitting / receiving section 103 has the same configuration as the wireless transmitting / receiving section 102. FIG. 8 is a block diagram showing details of the switching unit 29 in FIG. 7 and 8, the same parts as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
[0063]
Referring to FIG. 7, the wireless transmission / reception unit 102 according to the present embodiment is different from the first embodiment shown in FIG. 3 in that the optical transmitter / receiver unit 11 and the deserializer unit 12 and the serializer unit 14 and the electrical / optical converter A switching unit 29 having a one-to-two switching function in which the input / output side is a common terminal is inserted between the units 15, between the electrical / optical converter 28 and the serializer unit 27, and between the optical / electrical converter 24 and the deserializer unit 25. However, the configuration is such that the bus select unit 26 is deleted.
[0064]
Referring to FIG. 8, the switching unit 29 includes buffers 401 and 409 connected to the outputs of the optical / electrical converters 11 and 24, and 404 and 408 connected to the inputs of the electrical / optical converters 15 and 28. And whether or not an ALM has occurred in the wireless transmission / reception unit 102 of its own, and 402 and 410 connected to the input side of the deserializer units 12 and 25, 403 and 407 connected to the output side of the serializer units 14 and 27. And a high-frequency relay 411, 405 to which a power supply (+ V) is connected to one end of the drive coil and the output of the buffer 406 is connected to the other end. Note that as the high-frequency relays 411 and 405, commercially available RX relays (for example, manufactured by Matsushita Electric Works, Ltd.) may be used. The electrical interfaces on the output side of the optical / electrical converters 11 and 24, the input side of the electrical / optical converters 15 and 28, the input side of the deserializers 12 and 25, and the output side of the serializers 14 and 27 are as follows. In order to perform 100Ω differential transmission, two wires of + and-are required.
[0065]
Hereinafter, an example of the operation of the wireless base station system according to the second embodiment of the present invention configured as described above will be described.
[0066]
First, the flow of an uplink signal (received signal) received from an external terminal device (not shown) will be described with reference to FIGS.
[0067]
Referring to FIGS. 7 and 8, in the wireless transmission / reception unit 102, the reception multiplexed signal output from the wireless transmission / reception unit 103 is input to the optical / electrical conversion unit 24, where the multiplexed signal is converted from an optical signal to an electric signal, and the switching unit 29.
[0068]
Next, in the switching unit 29, the received multiplex signal converted into an electric signal by the optical / electrical conversion unit 24 is input to a buffer 409 that converts a differential input into an ECL (emitter coupled logic) output. The output of the buffer 409 is input to one of the high-frequency relays 411 having two circuits.
[0069]
A power supply (+ V) is connected to one end of the driving coil of the high-frequency relay 411 (and the high-frequency relay 405), and an ALM signal output indicating whether or not an ALM is generated in its own wireless transmission / reception unit 102 is connected to the other end. Have been. This ALM signal is at the L level when the wireless transmitting / receiving unit 102 is operating normally (H level when a failure occurs). The ALM signal is input to the other end of the drive coil via a buffer 406 through which a large drive current can flow.
[0070]
When the wireless transmission / reception unit 102 operates normally and the ALM signal is at the L level, the high-frequency relay 411 (and the high-frequency relay 405) enters an operating state due to the current flowing through the drive coil, and the two circuits in the high-frequency relay 411 (and Each of the two circuits in the high-frequency relay 405 has a relay contact state as shown by the solid line in FIG. That is, the high-frequency relay 411 (and the high-frequency relay 405) is in a driven state. Therefore, the reception multiplex signal of the wireless transmission / reception unit 103 passes through the optical / electric conversion unit 24 and the buffer 409, passes through one circuit of the high-frequency relay 411, and further passes through the buffer 410 that converts the ECL input into the differential transmission output. Then, it is input to the deserializer unit 25.
[0071]
Further, the differential transmission output of the combined reception multiplexed signal of the wireless transmission / reception unit 102 and the wireless transmission / reception unit 103 output from the serializer unit 27 is input to a buffer 407 that converts a differential input into an ECL output. The output of the buffer 407 passes through the other circuit of the high-frequency relay 411, passes through a buffer 408 that converts the ECL input into a differential transmission output, and is input to the electrical / optical converter 28.
[0072]
That is, in the present embodiment, when the wireless transmission / reception unit 102 is operating normally, the reception multiplexed signals of the wireless transmission / reception unit 102 and the wireless transmission / reception unit 103 are combined in the switching unit 29 and transmitted to the base station apparatus 101. Since they are output, each can be correctly decoded by the base station apparatus 101.
[0073]
On the other hand, when an ALM is generated in the wireless transmission / reception unit 102 and the ALM signal goes to the H level, the H level is input to the other end of the driving coil of the high-frequency relay 411 (and the high-frequency relay 405), so that the current flows to the driving coil. The current that has been interrupted is turned off, and the relay contacts of the two circuits of the high-frequency relay 411 (and the two circuits of the high-frequency relay 405) are as shown by the dotted lines in FIG. Therefore, the reception multiplex signal of the wireless transmission / reception unit 103 passes through the optical / electric conversion unit 24 and the buffer 409, passes through the two circuits of the high-frequency relay 411, passes through the buffer 408, and is input to the electric / optical conversion unit 28.
[0074]
That is, in the present embodiment, when the wireless transmission / reception unit 102 is operating abnormally, the reception multiplexed signal of the own wireless transmission / reception unit 102 is cut off in the switching unit 29 and the reception multiplexed signal of the subsequent wireless transmission / reception unit 103 is received. The signal is directly bypassed and output to base station apparatus 101.
[0075]
Subsequently, a flow of a downlink signal (transmission signal) transmitted to an external terminal device (not shown) will be described with reference to FIGS. 7 and 8.
[0076]
Referring to FIG. 7 and FIG. 8, in radio transmission / reception section 102, a transmission multiplexed signal output from base station apparatus 101 is input to optical / electric conversion section 11, converted from an optical signal to an electric signal, and switched to switching section 29. Is output to
[0077]
In the switching unit 29, as in the case of the received signal, when the wireless transmission / reception unit 102 is operating normally, the relay contacts of the two circuits of the high-frequency relay 411 (and the two circuits of the high-frequency relay 405) are connected by solid lines in FIG. When the ALM occurs in the wireless transmission / reception unit 102, the relay contacts of the two circuits of the high-frequency relay 411 (and the two circuits of the high-frequency relay 405) are as shown by the dotted lines in FIG.
[0078]
Therefore, when the wireless transmission / reception unit 102 is operating normally, the transmission multiplexed signal output from the base station apparatus 101 is input to the separation unit 13 via one circuit of the high-frequency relay 405, the buffer 402, and the deserializer unit 12. Is done. In the demultiplexer 13, similarly to the first embodiment, the transmission multiplexed signal output from the deserializer 12 is output to both the serializer 14 and the demultiplexer 16, and the transmission multiplexed signal input to the serializer 14 is Is output to the wireless transmission / reception unit 103 via the buffer 403, the other circuit of the high-frequency relay 405, the buffer 404, and the electrical / optical conversion unit 15.
[0079]
On the other hand, when an ALM is generated in the wireless transmission / reception unit 102, the transmission multiplexed signal output from the wireless base station 101 passes through the two circuits of the high-frequency relay 405, passes through the buffer 404, and passes through the electrical / optical conversion unit 15. It is output to the wireless transmission / reception unit 103.
[0080]
That is, in the present embodiment, when the wireless transmission / reception unit 102 operates abnormally, the transmission multiplex signal of the base station apparatus 101 is also bypassed as it is in the switching unit 29 as in the case of the reception multiplex signal. Output to 103.
[0081]
Therefore, for example, when a failure occurs in the wireless transmission / reception unit 102 installed at the position closest to the base station apparatus 101, in the related art, even if the subsequent wireless transmission / reception unit 103 is normal, Since the uplink signal (received multiplexed signal) may be destroyed by passing through the wireless transmission / reception unit 102, the operation of all the wireless transmission / reception units downstream of the wireless transmission / reception unit 102 has to be stopped (system shut down).
[0082]
On the other hand, in the present embodiment, since the uplink signal (received multiplexed signal) of the wireless transmission / reception unit 103 in the subsequent stage is configured to be bypassed to the base station apparatus 101 by the switching unit 29 of the wireless transmission / reception unit 102, When a failure occurs in the unit 102, the wireless transmission / reception unit 102 outputs the uplink signal (received multiplexed signal) to the base station apparatus 101 without being destroyed. Therefore, the operation of the wireless transmission / reception unit 103 at the subsequent stage is not stopped, and only the minimum required operation stoppage (only the failed wireless transmission / reception unit 102) can be performed, so that the service of the operation system can be continued.
[0083]
In the present embodiment, the down signal (transmission multiplex signal) of the base station apparatus 101 is also bypassed by the high-frequency relay 405 to improve reliability in response to the occurrence of the ALM. Since the signal (signal) is distributed to the subsequent wireless transmitting / receiving section 103 by the separating section 13 of the wireless transmitting / receiving section 102, the operation of bypassing the downlink signal (transmission multiplexed signal) can be deleted.
[0084]
【The invention's effect】
As described above, the present invention has the following effects.
[0085]
The first effect is that the wireless transmission / reception means is provided with bypass means for bypassing at least a reception multiplexed signal output from another wireless transmission / reception means connected to the subsequent stage, so that if a failure occurs, the wireless transmission / reception means is connected to the subsequent stage. Without destroying the received multiplexed signal of the other wireless transmitting / receiving means, it is possible to bypass-output the signal directly to the base station apparatus or the other wireless transmitting / receiving means connected to the preceding stage. Even if this occurs, the service of the operation system can be continued without stopping the operation of all wireless transmission / reception means connected in the subsequent stage.
[0086]
In the wireless transmitting / receiving means, there is provided first separating means for distributing the transmission multiplexed signal of the base station apparatus or the other wireless transmitting / receiving means connected to the preceding stage and outputting the multiplexed signal as it is to the other wireless transmitting / receiving means connected to the subsequent stage. Therefore, when a failure occurs, the transmission multiplexed signal of the base station device or the other wireless transmission / reception means connected to the preceding stage should be distributed and output to other wireless transmission / reception means connected to the subsequent stage without destruction. Can be.
[0087]
The second effect is that the base station apparatus multiplexes the transmission multiplexed signals for the plurality of radio transmission / reception means on the transmission side and separates the transmission multiplexed signal for each of the plurality of radio transmission / reception means on the reception side. Since the cascade connection with the transmission / reception means is realized, it is not necessary to connect the base station apparatus and each of the plurality of radio transmission / reception means independently, and the number of optical fibers to be used can be reduced. This means that a low-cost radio base station system can be supplied when borrowing. Furthermore, there is an effect that the base station device can be assigned a relationship of a master (master) and the wireless transmission / reception means can be assigned a relationship of a child (slave).
[0088]
A third effect is that a digital multiplexed signal in which a baseband signal and a control signal are multiplexed is transmitted via an optical fiber between a base station apparatus and a plurality of wireless transmission / reception means. And a low-cost system without restrictions on dynamic range.
[Brief description of the drawings]
FIG. 1 is an overall block diagram of a wireless base station system according to first and second embodiments of the present invention.
FIG. 2 is a block diagram illustrating details of a base station device 101 in the wireless base station systems according to the first and second embodiments of the present invention.
FIG. 3 is a block diagram illustrating details of a wireless transmission / reception unit 102 in the wireless base station system according to the first embodiment of the present invention.
FIG. 4 is a block diagram illustrating details of a bus selection unit 26 in the wireless transmission / reception unit 102 in the wireless base station system according to the first embodiment of the present invention.
FIG. 5 is a block diagram illustrating details of a combining unit in a wireless transmitting / receiving unit in the wireless base station systems according to the first and second embodiments of the present invention.
FIG. 6 is a diagram illustrating an example of a transmission format in the wireless base station systems according to the first and second embodiments of the present invention.
FIG. 7 is a block diagram illustrating details of a wireless transmission / reception unit 102 in a wireless base station system according to a second embodiment of the present invention.
FIG. 8 is a block diagram illustrating details of a switching unit 29 in a wireless transmission / reception unit 102 in a wireless base station system according to a second embodiment of the present invention.
[Explanation of symbols]
1 Transmission baseband signal processing unit
2 CPU
3 Composition section
4 Serializer section
5 Electric / optical converter
6 Optical / electrical conversion unit
7 Deserializer section
8 Separation unit
9 Reception baseband signal processing unit
11 Optical / electrical conversion unit
12 Deserializer section
13 Separation unit
14 Serializer section
15 Electric / optical converter
16 Separation unit
17 CPU
18 Transmission wireless processing unit
19 Duplexer section
20 Antenna part
21 Reception wireless processing unit
22 Synthesizing unit
23 Synthesis
24 Optical / electrical conversion unit
25 Deserializer
26 Bus select section
27 Serializer section
28 Electric / optical converter
29 Switching unit
101 base station equipment
102 Wireless transceiver
103 Wireless transceiver
104 Optical fiber
201a to 201d AND circuit (AND)
202 NOT circuit (NOT)
203a-203d AND circuit (AND)
204a to 204d OR circuit (OR)
301 Receive buffer
302 Transmission buffer
303 Synthetic buffer
401-404, 406-410 Buffer
405, 411 High frequency relay

Claims (10)

In a wireless base station system including a base station apparatus and a plurality of wireless transmitting / receiving units cascaded to the base station apparatus by two or one optical fiber,
The radio base station system according to claim 1, wherein the radio transmission / reception unit includes a bypass unit that bypasses a reception multiplexed signal output as an uplink signal from another radio transmission / reception unit connected at least in a subsequent stage. The wireless transmitting / receiving means includes a first combining means for combining a reception multiplexed signal output from another wireless transmission / reception means connected at a subsequent stage with a reception multiplexed signal of its own wireless transmission / reception means and outputting the combined signal to the bypass means. Have
The bypass unit cuts off the reception multiplex signal output from the first combining unit when a failure occurs in its own wireless transmission / reception unit, and receives the reception multiplex signal output from another wireless transmission / reception unit connected at a subsequent stage. The wireless base station system according to claim 1, wherein the signal is bypassed as it is and output to the base station device or another wireless transmitting / receiving means connected to the preceding stage. The bypass means outputs the reception multiplexed signal output from the first combining means to the base station apparatus or another wireless transmission / reception means connected to the preceding stage when its own radio transmission / reception means is operating normally. The wireless base station system according to claim 2. The wireless transmission / reception means distributes a transmission multiplex signal output as a downlink signal from the base station apparatus or another wireless transmission / reception means connected to a preceding stage, and transmits one transmission multiplex signal as it is to another wireless connection connected to a subsequent stage. The wireless base station system according to claim 3, further comprising a first separating unit that outputs the signal to the transmitting / receiving unit. The base station apparatus multiplexes a transmission baseband signal and a transmission control signal for performing setting or state monitoring of each of the plurality of radio transmission / reception means, generates a transmission multiplexed signal for the plurality of radio transmission / reception means, Output to the wireless transmission / reception means connected to, and separate the reception multiplexed signals for the plurality of wireless transmission / reception means output from the wireless transmission / reception means connected to the subsequent stage into a reception baseband signal and a reception control signal. Item 4. The wireless base station system according to item 3. The wireless transmitting / receiving means,
The other transmission multiplex signal distributed by the first demultiplexing means is input, and only the transmission multiplex signal addressed to the own radio transmission / reception means is extracted from the other input transmission multiplex signal, and the extracted transmission multiplex signal is further extracted. A second separating unit for separating and outputting a transmission baseband signal and a transmission control signal,
Transmission radio processing means for receiving the transmission baseband signal output from the second separation means, converting the input transmission baseband signal into a transmission radio signal for wireless transmission to the outside, and outputting the transmission radio signal;
A control unit that receives a transmission control signal output from the second separation unit and generates and outputs a reception control signal for performing a setting response or a state monitoring response to the base station device based on the input transmission control signal When,
A receiving wireless processing means for receiving a receiving wireless signal received wirelessly from outside, converting the input receiving wireless signal into a receiving baseband signal, and outputting the converted signal.
The reception control signal output from the control means and the reception baseband signal output from the reception radio processing means are input, and the input reception control signal and the reception baseband signal are multiplexed to control the own radio transmission / reception means. The radio base station system according to claim 5, further comprising: a second combining unit that generates and outputs a reception multiplexed signal. The wireless transmitting / receiving means,
A first optical / electrical conversion unit that receives a reception multiplexed signal output from another wireless transmission / reception unit connected in a subsequent stage, converts the input reception multiplexed signal from an optical signal to an electric signal, and outputs the converted signal;
A first deserializer unit that receives a reception multiplex signal output from the first optical / electrical conversion unit, converts the input reception multiplex signal from serial data to parallel data, and outputs the parallel data to the bypass unit;
A first serializer that receives the received multiplexed signal output from the bypass unit, converts the input received multiplexed signal from parallel data to serial data, and outputs the data;
The received multiplexed signal output from the first serializer means is input, the received multiplexed signal is converted from an electric signal to an optical signal, and the converted signal is output to the base station apparatus or another wireless transmission / reception means connected to the preceding stage. A first electrical / optical conversion means,
The bypass means, when its own wireless transmission / reception means has a fault, transmits a reception multiplexed signal output from another wireless transmission / reception means connected to a subsequent stage from the first deserializer means to the first serializer means. 7. The radio base station system according to claim 6, wherein the radio base station system is a bypass bus selection unit. The wireless transmitting / receiving means,
A second optical / electrical device that receives a transmission multiplex signal output from the base station apparatus or another wireless transmission / reception unit connected to the previous stage and converts the input transmission multiplex signal from an optical signal to an electric signal and outputs the converted signal. Conversion means;
A second deserializer for receiving a transmission multiplex signal output from the second optical / electrical converter, converting the input transmission multiplex signal from serial data to parallel data, and outputting the converted data to the first separator; When,
Second serializer means for receiving one of the transmission multiplex signals distributed by the first separation means as input, converting the input transmission multiplex signal from parallel data to serial data, and outputting the data;
A second transmission / reception device that receives the transmission multiplex signal output from the second serializer means, converts the input transmission multiplex signal from an electric signal to an optical signal, and outputs the converted signal to another wireless transmission / reception means connected to a subsequent stage; The wireless base station system according to claim 7, further comprising: a / light conversion unit. The wireless transmitting / receiving means,
A first optical / electrical converter that receives a multiplexed signal output from another wireless transmission / reception unit connected at a subsequent stage, converts the received multiplexed signal from an optical signal to an electric signal, and outputs the electric signal to the bypass unit. Means,
A first receiving multiplexed signal output from the bypass unit, converting the received multiplexed signal from an electric signal to an optical signal, and outputting the converted multiplexed signal to the base station apparatus or another wireless transmitting / receiving unit connected to a preceding stage; Electrical / optical conversion means of
A first serializer for receiving the received multiplexed signal output from the first combining unit, converting the input received multiplexed signal from parallel data to serial data, and outputting the serial data to the bypass unit;
A first deserializer unit that receives the received multiplexed signal output from the bypass unit as input, converts the input received multiplexed signal from serial data to parallel data, and outputs the converted data to the first combining unit;
The bypass unit is configured to, when a failure occurs in its own wireless transmission / reception unit, convert a reception multiplexed signal output from another wireless transmission / reception unit connected at a subsequent stage from the first optical / electrical conversion unit to the first multiplexed signal. 7. The wireless base station system according to claim 6, wherein the wireless base station system is a switching unit that bypasses the electric / optical conversion unit. The wireless transmitting / receiving means,
A transmission multiplex signal output from the base station apparatus or another wireless transmission / reception means connected to the preceding stage is input, and the input transmission multiplex signal is converted from an optical signal to an electric signal and output to the switching means. Light / electricity conversion means;
A second electrical / optical converter that receives the transmission multiplex signal output from the switching unit as an input, converts the input transmission multiplex signal from an electric signal to an optical signal, and outputs the converted signal to another wireless transmission / reception unit connected downstream; Means,
A first serializer for receiving one of the transmission multiplex signals distributed by the first demultiplexer as input, converting the input transmission multiplex signal from parallel data to serial data, and outputting the serial data to the switching means;
A first deserializer unit that receives the transmission multiplex signal output from the switching unit as input, converts the input reception multiplex signal from serial data to parallel data, and outputs the converted data to the first separation unit;
The switching unit is configured to, when a failure occurs in its own wireless transmitting / receiving unit, transmit a transmission multiplexed signal output from the base station apparatus or another wireless transmitting / receiving unit connected to a preceding stage from the second optical / electrical converting unit. The wireless base station system according to claim 9, wherein the wireless base station system bypasses the second electric / optical converter.

Images